No evidence has been produced publicly and the firm has repeatedly denied the claims.

However, the criticism has led several Western countries and companies to look into whether they should allow Huawei’s equipment to be used in their telecoms networks, straining relations with Beijing.

Polish public TV channel TVP said security services had searched the local offices of Huawei and the offices of telecoms firm Orange Polska (OPL.WA) (ORAN.PA), where it said the Polish national works.